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Finding the Fourth Proportional to 291,708, 437,635.80 and 81,345.96

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Solution

The fourth proportional to 291,708, 437,635.80 and 81,345.96 is: 122,039.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,708 : 437,635.80 = 81,345.96 : x
  2. Step 2: Convert to fraction form
    291,708/437,635.80 = 81,345.96/x
  3. Step 3: Cross multiply
    291,708x = 437,635.80 × 81,345.96
  4. Step 4: Simplify right side
    291,708x = 35,599,904,281.37
  5. Step 5: Solve for x
    x = 35,599,904,281.37/291,708
  6. Step 6: Final answer
    x = 122,039.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.